SiP12503 Vishay Siliconix 500-mA - Adjustable Boost Converter for Single or Dual Cell DESCRIPTION FEATURES SiP12503 is a boost converter IC with adjustable output voltage for single or dual cell NiMH or Alkaline battery pack. Featuring with an internal low resistance power MOSFET, it is capable of starting up with a low battery voltage of 0.85 V. It only needs six external components (an inductor, a diode,two capacitors and two resistors) to construct a step-up converter. For best efficiency performance, it is designed to operate in PWM mode with 300 kHZ switching frequency under normal load and in PFM mode under light load. The voltage-mode control loop is internally compensated, simplifying converter design and reducing external parts count. It accepts input voltages from 0.85 V to 5.0 V, and adjustable output voltages from 2 V to 5 V. It also features low shutdown current of under 1 µA, over voltage protection, thermal shutdown protection, and antiring control to minimize EMI. • Voltage mode control with internal frequency compensation • 0.85 V to 5.0 V input voltage range • Adjustable output voltage range from 2.0 V to 5.0 V • Low startup voltage: 0.65 V • PWM control with 300 kHz fixed switching frequency • PFM control for light load • Powered from the output voltage supply • Integrated UVLO and soft-start • Logic controlled shutdown (< 1 µA) • 85 % typical efficiency • Internal power MOS switch: 0.2 Ω at 3.3 V output • Antiringing switch to minimize EMI • Shutdown input • Thermal shutdown • Minimum external components • PowerPAK® MLP33-6 package (DFN-6, 3 x 3) • Over voltage protection SiP12503 is available in a lead (Pb)-free 6 pin, PowerPAK MLP33 package and is specified to operate over the industrial temperature range of - 40 °C to 85 °C. APPLICATIONS • • • • • • Portable applications Battery-powered equipment Handheld devices Digital cameras Wireless handsets LCD and OLED bias TYPICAL APPLICATION CIRCUIT VIN 10 µH 2 10 µF VIN XSHD 1 XSHD LX 6 MBR0520 VOUT 47 µF 450 KΩ SiP12503 FB 3 VOUT GND 4 100 KΩ 5 Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 www.vishay.com 1 SiP12503 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS (all voltages referenced to GND = 0 V) Parameter Limit Input Voltage, VIN - 0.3 to VOUT + 0.5 LX Voltage Output Voltage, VOUT V - 0.3 to 6 - 0.3 to VIN + 0.5 XSHD Voltage FB Voltage - 0.3 to 6 Maximum Junction Temperature 150 Storage Temperature - 55 to 150 Operating Junction Temperature °C 125 PowerPAK MLP33-6 (TA = 70 °C)a Power Dissipationa Thermal Resistance Unit - 0.3 to 6 b PowerPAK MLP33-6 1100 mW 50 °C/W Notes: a. Derate 20 mW/°C above 70 °C. b. Device mounted with all leads soldered or welded to PC board. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING RANGE (all voltages referenced to GND = 0 V) Parameter Limit Input Voltage, VIN Unit 0.85 to 5.0 Output Voltage, VOUT 2.0 to 5 XSHD Voltage 0 to VIN V LX Voltage 0 to VOUT + 0.5 FB Voltage 0 to 5 VOUT Operating Temperature Range - 40 to 85 °C SPECIFICATIONS Limits Test Conditions Unless Specified Parameter Symbol VIN = 1.2 V, VOUT = Vnome, TA = 25 °C Temp.a Minimum Start-Up Voltage VSTART ILOAD = 1 mA Full Minimum Operating Voltaged VHOLD XSHD = VIN UVLO VUVLO Rising VOUT UVLO Hysteresis VUVLOHYST FB Voltage Accuracy VFB Feedback Input Current IFB Min.b Typ.c Max.b 0.65 0.85 0.55 Full 1.8 Full V 0.100 - 1.5 + 1.5 - 25 to 85 °C - 3.0 + 3.0 Full - 3.5 + 3.5 VFB = 0.6 V 1 Maximum PWM Duty Cycle MAXDTY Full 80 87 PWM Switching Frequency fOSC Full 225 300 www.vishay.com 2 2 Unit % nA % 375 kHz Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 SiP12503 Vishay Siliconix SPECIFICATIONS Limits Test Conditions Unless Specified Parameter Symbol Supply Current 1 Supply Current 2 OUT VIN = 1.2 V, VOUT = Vnome, TA = 25 °C Typ.c Max.b VOUT = Vnom X 0.95 330 450 VOUT = Vnom + 0.5 V, VLX > VIN 134 Temp. Min.b VOUT = Vnom + 0.5 V, VLX < VIN Supply Current 3 Stand-By Current ISTB XSHD = 0 V, not including switch leakage NMOS Switch Leakage ILEAK LX = 5 V RDS(on) VOUT = 3.3 V NMOS Switch On Resistance a 44 1 1 Full 3 IFTOF 22 VXSHDL Softstart Time tSTART 0.8 V ≤ VIN ≤ 0.9 V Full 0.55 0.9 V< VIN ≤ 2 V Full 0.8 2 V < VIN ≤ 5 V Full 1.2 mA V Full ViN = 1.8 V Ω 0.2 IWTOF XSHD Input Low Level 2 10 PWM to PFM Current Threshold VXSHDH µA Full PFM to PWM Current Threshold XSHD Input High Level Unit 0.2 1.6 Over Voltage Threshold VOV 110 Over Voltage Hysteresis VOVHYST 10 Thermal Shutdown TSHD 160 Thermal Shutdown Hysteresis THYST 20 ms % °C Notes: a. Full = - 40 °C to 85 °C. b. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum (- 40 °C to 85 °C). c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. d. Minimum operating voltage is determined by the battery’s capability to provide energy as it is deeply discharged. e. Vnom equals programmed output voltage. Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 www.vishay.com 3 SiP12503 Vishay Siliconix PIN CONFIGURATION AND TRUTH TABLE PowerPAK MLP33-6 XSHD 1 6 LX VIN 2 5 GND VOUT 3 4 FB Top View ORDERING INFORMATION Part Number Temperature Range Marking SiP12503DMP-T1-E3 - 40 °C to 85 °C 2503 PIN DESCRIPTION Pin Number Name 1 XSDH 2 VIN 3 VOUT 4 FB 5 GND 6 LX Function Logic controlled shutdown Input, XSHD = high: normal operation, XSHD = low: shutdown Input voltage Output of the boost converter and power source for the IC-battery Output voltage feedback pin Signal and power ground Switch pin PIN FUNCTIONS XSHD (Pin 1) GND (Pin 5) XSHD is a logic-level shutdown control pin. When XSHD is low, the IC’s switching is disabled, and an antiringing switch is connected between LX and VIN. When XSHD is high, the IC is working in normal operation. GND is the ground pin for signal and power ground. VIN (Pin 2) VIN is the pin connected to battery input voltage. At start-up, SiP12503 is powered from the voltage at the VIN pin. Once VOUT exceeds VIN, the SiP12503 is powered from VOUT. This increases the drive to the gate of the internal power switch, to allow higher maximum output currents and higher converter efficiency. LX (Pin 6) LX connects to the drain of the internal power MOSFET (boost switch). Externally, the LX pin should be connected to the boost inductor and Schottky diode. If the inductor current falls to zero, or XSHD is low, an internal antiringing switch is short from LX to VIN to minimize EMI. VOUT (Pin 3) VOUT is the output of the boost converter and also the power source for the IC. FB (Pin 4) FB is the output voltage feedback pin via an external resistor divider. The feedback voltage is nominally 0.6 V. www.vishay.com 4 Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 SiP12503 Vishay Siliconix FUNCTIONAL BLOCK DIAGRAM VIN VOUT GND Over Voltage Compensation Antiringing SW Start-Up LX FB XSHD E/A + Reference and Soft-Start + PWM - Driver PFM Oscillator DETAILED OPERATION SiP12503 is a 300 kHz boost converter IC, packaged in 6 pin MLP33 PowerPAKTM package. With start-up from input voltages as low as 0.65 V, this device features fixed frequency voltage mode PWM control with internal frequency compensation. With its low RDS(on) internal power MOSFET, this device maintains high efficiency over a wide range of load current. Under light load conditions, it switches to in PFM mode to maintain high efficiency. A FB pin is available to adjust the output voltage. Low Voltage Start-Up SiP12503 is designed to start-up at input voltage of typically 0.65 V. At start-up, VOUT is lower than VIN due to the voltage drop of the Schottky diode. Therefore, the device uses VIN as the power source for its control logic and internal gate drive, until VOUT exceeds VIN. During the start-up interval, the boost switch’s conduction interval during each cycle is determined by the time taken for the inductor current to reach internal current limit, followed by a fixed off time before the switch is allowed to turn on again. Once VOUT exceeds VIN, the device uses VOUT as the IC’s power source. When VOUT exceeds 1.89 V, the device engages is built-in soft-start circuitry. Over Voltage Protection If the output voltage is above 10 % of the regulation voltage, the device will turn off the internal power mosfet and wait until the output voltage fails below the regulation voltage, then the PWM operation is enabled again. Thermal Shutdown Protection If the internal device temperature rises above 160 °C, the device will turn off the internal power MOSFET. Once the die temperature falls below 140 °C, then the device performs a new soft-start cycle, and the converter resumes normal operation. Antiringing Control The antiringing control circuitry prevents high frequency ringing at the LX pin as the inductor current goes to zero by damping the resonant circuit formed by L and CLX (capacitance on LX pin). When the IC is shutdown, this antiringing switch is also turned on. APPLICATION INFORMATION Soft-Start Setting the Adjustable Output Voltage During soft-start, the loop compensation guarantees the slow increase of output voltage, so that no large voltage overshoot or inrush current transients occur when the soft-start period ends. The SiP12503 regulated output can be adjusted from 1.8 V to 5.0 V via a resistor divider network from VOUT to GND. R1 and R2 should be kept in the 50 kΩ to 100 kΩ range for low power consumption while maintaing adequate noise immunity. The value of R1 is calculated using the following formula: PWM operation After the soft-start interval is over, the device works in PWM operation with a fixed frequency of 300 kHz, with automatic switch-over to PFM operation during light load conditions. R1 = R2 * [(VOUT/VFB) - 1] VFB = 0.6 V PFM Operation When operating into light loads, the SiP12502 automatically switches to PFM operation. This reduces gate charge losses in the boost switch, hence raising converter efficiency. Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 www.vishay.com 5 SiP12503 Vishay Siliconix TYPICAL CHARACTERISTICS 0.40 320 310 0.35 Supply Current 1 (mA) Frequency (kHz) 300 290 280 270 0.30 0.25 260 250 - 50 - 30 - 10 10 30 50 70 0.20 - 50 90 - 30 - 10 10 30 50 70 90 Temperature (°C) Temperature (°C) Supply Current 1 vs Temperature Frequency vs. Temperature 93 0.180 92 0.175 90 0.165 % Duty Cycle Supply Current 2 (mA) 91 0.170 0.160 0.155 89 88 87 86 0.150 85 0.145 84 0.140 - 50 - 30 - 10 10 30 50 70 83 - 60 90 - 40 - 20 Supply Current 2 vs. Temperature 20 40 60 80 100 Maximum PWM Duty Cycle vs. Temperature 0.18 1.0 0.16 0.9 Shutdown Input Voltage Threshold (V) 0.14 0.12 RDS(on) Ω 0 Temperature (°C) Temperature (°C) 0.10 0.08 0.06 0.8 0.7 0.6 0.5 0.4 0.04 0.3 0.02 0.00 0 1 2 3 4 VOUT (V) RDS(on) vs. Output Voltage www.vishay.com 6 5 6 0.2 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VIN (V) Shutdown Input Voltage Threshold vs. VIN Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 SiP12503 Vishay Siliconix TYPICAL CHARACTERISTICS 1.2 4 VIN = 5.0 V 1.0 Shutdown Threshold (V) Feedback Voltage Accuracy (%) 3 2 1 0 -1 0.8 VIN = 2.0 V 0.6 VIN = 0.8 V 0.4 -2 0.2 -3 -4 - 50 - 30 - 10 10 30 50 70 0.0 - 50 90 10 30 50 70 Temperature (°C) Temperature (°C) Shutdown Threshold vs. Temperature 100 80 90 70 80 90 70 Efficiency (%) 60 Efficiency (%) - 10 Feedback Voltage vs. Temperature 90 50 40 30 60 50 40 30 20 20 10 10 0 0.1 - 30 1 10 100 1000 0 0.1 1 10 100 Load Current (mA) Load Current (mA) VIN = 1.2 V, VOUT = 2 V VIN = 2.4 V, VOUT = 3.3 V 1000 100 90 80 Efficiency (%) 70 60 50 40 30 20 10 0 0.1 1 10 100 1000 Load Current (mA) VIN = 2.4 V, VOUT = 5 V Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 www.vishay.com 7 SiP12503 Vishay Siliconix TYPICAL WAVEFORMS VOUT 50 mV/div VOUT 20 mV/div LX 2 V/div LX 2 V/div 1 µs/div 100 µs/div Typical Switching Waveform PWM Mode VIN = 1.2 V, VOUT = 3.3 V, Load Current = 150 mA, L = 10 µH; COUT = 47 µF Typical Switching Waveform PFM Mode VIN = 1.2 V, VOUT = 3.3 V, Load Current = 10 mA, L = 10 µH; COUT = 47 µF VOUT 1 V/div 5 ms/div Soft Start VIN = 1.2 V, VOUT = 3.3 V, Load Current = 50 mA, L = 10 µH; COUT = 47 µF Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see www.vishay.com/ppg?73579. www.vishay.com 8 Document Number: 73579 S09-1454-Rev. B, 03-Aug-09 Package Information Vishay Siliconix PowerPAKr MLP33-6, 8 and 10 (POWER IC ONLY) 4xQ // ccc A NX 8 Detail D TopView C A2 A1 A3 0.08 C Side View Detail C NX b bbb M C A A e 1 ÉÉÉ ÇÇ ÉÉÉ ÇÇ ÉÉÉ Detail C A1 Seating Plane C 5 ddd M C 2 Exposed Pad (Optional) L 7 R2 R 11 D E2 L2 E2/2 Detail D A B NxK See Detail A 7 N 8 N-1 6 See Detail B D2/2 (ND-1) x Pin 1 Mark 4 e 9 D2 aaa C 9 Bottom View 2X 2X Datum A or B ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ aaa C 1 E L2 Datum A or B NX R1 NX R1 L e/2 e Even pin/Side L2 pin Tip e pin Tip 5 Odd pin/Side 5 Detail B 0.17 min L1 Exposed Slug/Heat Sink L2 This Feature Applies To Both Ends of The Package 0.17 0.30 B Exposed Metalized Feature Detail A Document Number: 72820 28-Jan-04 10 Edge of Plastic Body www.vishay.com 1 Package Information Vishay Siliconix PowerPAKr MLP33-6, 8, 10 N = 6 PITCH: 0.95 mm N = 8 PITCH: 0.65 mm N = 10 PITCH: 0.50 mm MILLIMETERS* Dim A A1 A2 A3 aaa b-6 b-8 b-10 bbb ccc D D2 ddd E E2 e-6 e-8 e-10 K L L1-6 L1-8 L1-10 L2 R Ref R1 Ref-6 R1 Ref-8 R1 Ref-10 Q INCHES Basic Min Nom Max Basic Min Nom Max Notes − 0.80 0.90 1.00 − 0.031 0.035 0.039 1, 2 − 0.00 0.025 0.05 − 0.000 0.001 0.002 1, 2 − 0.65 0.70 0.75 − 0.026 0.028 0.030 1, 2 − 0.15 0.20 0.25 − 0.006 0.008 0.010 1, 2 − − 0.10 − − − 0.004 − 1, 2 − 0.33 0.35 0.43 − 0.013 0.014 0.017 1, 2, 8 − 0.285 0.305 0.385 − 0.011 0.012 0.015 1, 2, 8 − 0.18 0.20 0.28 − 0.007 0.008 0.011 1, 2, 8 − − 0.10 − − − 0.004 − 1, 2 − − 0.10 − − − 0.004 − 1, 2 3.00 − − − 0.118 − − − 1, 2, 8 − 1.92 2.02 2.12 − 0.076 0.080 0.083 1, 2, 8 − − 0.05 − − 3.00 − − − 0.118 − − − 1, 2, 8 − 1.10 1.20 1.30 − 0.043 0.047 0.051 1, 2, 8 − − 0.95 − − − 0.037 − 1, 2 − − 0.65 − − − 0.026 − 1, 2 − − 0.50 − − − 0.020 − 1, 2 − 0.20 − − − 0.008 − − 5, 11 − 0.20 0.29 0.45 − 0.008 0.011 0.018 1, 2, 8 − 0.16 0.24 0.40 − 0.006 0.009 0.016 1, 2, 8 − 0.16 0.24 0.40 − 0.006 0.009 0.016 1, 2, 8 − − − − − − − − 1, 2, 8 − − − 0.125 − − − 0.005 5, 11 − − 0.15 − − − 0.006 − 1, 2, 8 − − 0.127 − − − 0.005 − 1, 2, 8 − − 0.15 − − − 0.006 − 1, 2, 8 − − 0.075 − − − 0.003 − 1, 2, 8 − 0_ 10_ 12_ − 0_ 10_ 12_ 1, 2 0.002 1, 2 * Use millimeters as the primary measurement. ECN: S-40082—Rev. A, 02-Feb-04 DWG: 5925 NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters. All angels are in degrees. 3. N is the total number of pins. 4. The pin #1 identifier and pin numbering convention shall conform to JESD 95-1 SPP-012. Details of pin #1 identifier is located within the zone indicated. The pin #1 identifier is marked. 5. Dimension b applies to metallized pin and is measured between 0.15 mm and 0.20 mm from the pin tip. 6. ND refers to the maximum number of pins on the D side. 7. Depopulation of pins is allowed and will be called out on the individual variation. 8. Coplanarity applies to the exposed heat sink slug as well as the pins. 9. Profile tolerance (aaa) will be applicable only to the plastic body and not to the metallized features (such as the pin tips and tie bars.) Metallized features may protrude a maximum of L2 from the plastic body profile. 10. L1 max is not called out, the metallized feature will extend to the exposed pad. Thus, the 0.17-mm gap does not apply. 11. The corner will be sharp unless otherwise specified with radius dimensions. www.vishay.com 2 Document Number: 72820 28-Jan-04 Legal Disclaimer Notice Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. 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Parameters provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 11-Mar-11 www.vishay.com 1